Connection for lamps or other electric apparatus.



x A A. DENEREAZ.

CONNECTION FOR LAMPS OR OTHER ELECTRIC APPARATUS.

APPLICATION FILED 00'1. 5, 1 909.' RENEWED MAY 8, 1913.

Patented July 8, 1913;

AUGUSTE lDN'RAz.

I Em A k l Attorney.

STATES PATENT OFFICE.

AUGUSTE DE'NERE'AZ, or MONTREUX. SWITZERLAND, ASSIGNOR TO socn irn ANONYME POUR LEXPLOI'I'ATION nns BRE'vnrs A.DEN153REAZ,0F MONTREUX. SWITZERLAND,

A CORPORATION OF SWITZERLAND.

CONNECTION FOR LAMPS OR OTHER ELECTRIC APPARATUS.

To (All whom it may concern:

Be it known that l, Auct's'rn Drixr'auiaz, printer, citizen of Switzerland, and resident of Montreux, in the Canton of Vaud and State of Switzerland, have invented certain new and useful Connections for Lamps or other lillectric Apparatus, of which the iollowing a specification.

This invention relates to asocket or holder and plug for electric lamps or wall plugs for apparatus using electric current and has the following features :.-In the first place by the use of well-known means, fuses, for" instance, the socket with its immovable plug can only receive the predetermined current for which it has been constructed. Secondly the socket when it has been connected with an electric circuit cannot be removed without damaging it, and thirdly the outer part of the socket is entirely of insulating material, no metallic parts being exposed.

In the accompanying drawing illust ating by way of example one form'ol the invention Figure 1 is a longitudinal section on the line A-B of Fig. 2. Fig. 52 is a longitudi nal. section on the line C--.D of Fig. 1. Fig. 3 is a transverse section on the line E--l of Fig. 1. Fig. & is a transverse section on the line GH of Fig. 2.. Figs. 5 to each show in transverse section and to reduced scale a modified form of the opening of the socket and the part of the plug which is adopted to fit it.

' The socket shown comprises the casing a of insulating material such for example as porcelain, glass, etc., this casing having on its upper side the orifice Z) intended for securingthe socket and for the passage of the conducting wires 0, d.

On the lower side of the casing a is secured a piece 6 of insulating material freely adjustable in a bearing 7' of polygonal section and carrying six blade springs. Two of these springs g, held by means of a bolt 72,

are bent back in such manner as to form a holder to engage the plug In the example illustrated the plug is intended for an in -andescent lamp. but it may be used for any other apparatus utilizing electric current. It may for example form .2 wall plug carrying Specification of Letters Patent. Application filed October 5, 1909. Serial No. 521,171. Renewed May 8, 1913.

-whieh hold the springs 72.,

rstememnu s, 1913.

Serial No. 76 6328.

a conductor connected in any suitable manner to heating; lighting, electrolizing or like apparatus.

'l'he plug 27 carries the two metallic springs /l: connected to the conductors Z, m and when it is engaged in the socket, between the bent blades 9', each of the blades It: comes in contact with one of the two blade springs a secured to the member 6 by bolts 0 and each connected to one of the conductors a, (Z.

- Above each spring 12. a blade spring 7) is secured to the member (2 by the same bolts 0 said blade springs 7) being shorter than the others and bent in such manner that they tend continuously to expand toward the outside of the member 0 in such manner that when this member is introduced into the bottoinjpf the bearing f the edges of these blades engage under the opening 1 in two recesses in the inner wall of the cover a. at two diametrically opposite points. Under these conditions the member 1; cannot be withdrawn from the casing a without breaking the latter or damaging the said member 6.

The plug 1' and the corresponding opening r in the socket have a similar polygonal section so that it is sutlieient to modify the number of the'sides ot' the polygon in order that only a plug of the same shape and size can engage, in the socket. This will, for example, prevent a subscriber for electric light from placing in the sockets, electric lamps of a stronger luminous intensity than those for which he has made an agreement.

Figs. 5 to 8 show examples of di'tlercut polygonal sections. It will be evident that the shape and size of the separate parts of the socket and plug described may be varied, for example, the number of sides of the polygonal section of the opening of the socket and of the plug adjusted to it may be other than those illustrated in the annexed drawing.

Having now described my invention, I claim as new and wish to secure by Letters Patent:

in an electrical connection, a socket having a casing entirely of insulating material and a polygonal opening, a plug corrcspondspring blades engaging the recesses of the ing exactly to the shape of the socket opening, said plug being provided with Contact springs and conductors, a member located in the lower end of the socket also provided with conductors and Contact springs abutting the Contact springs of the plug; said member having, moreover, springs forming a holder for the plug, in combination with Copies of this patent may be obtained for five cents each,

by addressing the Commissioner of Patents, Washington, D, 

